厌氧膜生物反应器处理酰胺工业废水的碳中和潜力——能源回收与碳减排  

Carbon-neutral potential in treatment of amide-containing industrial wastewater by anaerobic membrane bioreactor(AnMBR):Energy recovery and carbon emission reduction

作　　者：张新政 范煜秦 薛意 张涛 陈荣[4] 李大鹏[1] 潘杨[1] 李玉友[5] 孔哲 ZHANG Xinzheng;FAN Yuqin;XUE Yi;ZHANG Tao;CHEN Rong;LI Dapeng;PAN Yang;LI Yuyou;KONG Zhe(School of Environmental Science And Engineering,Suzhou University of Science and Technology,Suzhou 215009;School of Environment,Nanjing University,Nanjing 210023;School of Environmental Science And Engineering,Tongji University,Shanghai 200092;Key Lab of Environmental Engineering,Shaanxi Province,Xi’an University of Architecture and Technology,Xi’an 710055;Department of Civil and Environmental Engineering,Graduate School of Engineering,Tohoku University,Sendai,Japan 9808579)

机构地区：[1]苏州科技大学环境科学与工程学院,苏州215009 [2]南京大学环境学院,南京210023 [3]同济大学环境科学与工程学院,上海200092 [4]西安建筑科技大学陕西省环境工程重点实验室,西安710055 [5]东北大学工程研究生院土木与环境工程系,日本仙台980-8579

出　　处：《环境工程学报》2024年第9期2637-2646,共10页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(52100100);江苏省自然科学基金(BK20210871);苏州市姑苏创新创业领军人才项目(ZXL2022498);江苏省研究生实践创新项目(SJCX23_1719)。

摘　　要：近年来碳中和理念逐渐被工业废水处理领域所重视,厌氧膜生物反应器(AnMBR)被认为具有低碳节能与资源化利用等优点,可被应用于酰胺类工业废水的处理并实现废水处理过程中的能源回收与CO_(2)减排。本研究在实验室小试规模下,利用AnMBR系统对含二甲基甲酰胺(DMF)的高浓度酰胺工业废水进行了长期连续实验,并进行了理论计算。通过与相同规模的传统活性污泥法(CAS)在能耗、CO_(2)排放和经济性上的对比,评估了AnMBR的实际应用潜力。实验结果显示,在化学需氧量(COD)为9657 mg·L^(−1)的条件下,AnMBR系统的净能源收入达到9.72 kWh·m^(−3),完全实现了能源自给,并且CO_(2)净排放为负值(−2.34 kg·m^(−3)),表明AnMBR具备碳负排放的潜力。相比之下,传统的活性污泥法(CAS)在处理相同废水时,始终呈现正值碳排放,且无法实现能源回收。经济分析表明,采用AnMBR工艺的污水处理厂不仅能大幅降低处理成本,还可通过CH4发电和高纯度沼气销售获得显著经济效益。综上所述,AnMBR作为一种新兴的碳中和技术,在处理高浓度工业有机废水方面展现出卓越的节能减排优势,具有取代CAS工艺的潜力,有助于推进工业废水处理技术的绿色低碳转型。With the growing concern about the concept of carbon neutrality in the treatment of industrial wastewater,anaerobic membrane bioreactor(AnMBR),known for its advantages of energy conservation,carbon reduction and resource utilization,is considered as a good alternative for the treatment of amide industrial wastewater.In this study,a long-term continuous experiment was conducted using an AnMBR system to treat industrial wastewater with a high concentration of dimethylformamide(DMF),complemented by theoretical calculations.The practical application potential of the AnMBR system was evaluated by comparing its energy consumption,carbon dioxide emissions,and economic performance with that of a conventional activated sludge(CAS)process of the same scale.The experimental results demonstrated that under a chemical oxygen demand(COD)of 9657 mg·L^(−1),the net energy income of the AnMBR system reached 9.72 kWh·m^(−3),fully achieving energy self-sufficiency.Additionally,the net carbon dioxide emission was negative(-2.34 kg·m^(−3)),indicating that the AnMBR system had the potential for negative carbon emissions.In contrast,the traditional activated sludge process(CAS)consistently showed positive carbon emissions and fails to achieve energy recovery when treating the same wastewater.The economic analysis indicated that the AnMBR process could significantly reduce treatment costs while generating substantial economic benefits through methane power generation and the sale of high-purity biogas.In summary,AnMBR,as an emerging carbon-neutral technology,demonstratesd outstanding advantages in energy savings and emission reduction for treating high-concentration industrial organic wastewater.It holds the potential to replace the CAS process,thereby contributing to the green and lowcarbon transformation of industrial wastewater treatment technology.

关 键 词：碳中和 工业废水 厌氧消化 厌氧膜生物反应器 酰胺 二甲基甲酰胺 碳排放 生物质能源 

分 类 号：X703[环境科学与工程—环境工程]